PowMeter

Measure Current with an ACS712-20A. Values will send to Iobase every 5 seconds.
Additional a DB18B20 temperature sensor was added to board.
The Gerber-file you can also download in files section.
Attention: There is a 230V part on board !!! Use the board as your own risk!
The board is only to be used for test puposes and must be under constant observation.
You have to put solder onto high voltage tracks to give more diameter!
I do not recommend to use in a wall socket.
And finally protect against contact - for example with hot glue.

Setup:
After flashing the powmeter will start in configure mode. You can access a wlan named 'Sonoff' (I use this on every project).
WLan password is 'sonoff-2017-iob'. ( If you able to compile - you can changed this in config.h )
Now load the web page http://192.168.4.1. You can setup your device....
ADC-NULL is the summary of 10 adc-reads that represent NO powered device. So you can adjust the measurement.
... You can change this parameter later if you call http://<ip-of-powmeter>/setup.html
After setting up your can call the associated IP and you see some infos. At end of page you see 10 readings of ADC.
At least the summary of them. This value you have to set in ADC-NULL (if no consumer was attached while measure).
I prefer to reload the page after 10 seconds and use next value.</ip-of-powmeter>

Screenshot: